On INIT? Really An Error Already?

I have built several static sites with middleman. I love it. went to start a new site today and this is the error i get when init. my site is able to be built and output to build. Should i be worried about this? Thanks In Advance, Thomas

An error occurred while installing ffi (1.9.23), and Bundler cannot
continue.
Make sure that gem install ffi -v '1.9.23' succeeds before bundling.